If n is a positive integer, for which of the following wo...

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PS · Problem Solving

605-655

Number Properties

If n is a positive integer, for which of the following would the units digit always be equal to the units digit of n?

I. n^5

II. n^10

III. n^25

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A

I only

B

II only

C

III only

D

I and III only

E

I, II, and III

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